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Compiling Iray shaders question

SlowmichaelSlowmichael Posts: 65
in Technical Help (nuts n bolts)

Is this process done by the CPU? If the CPU does this why is my CPU usage quit low during this process.

What influences the speed of this process; cpu, gpu, hdd,....?

Comments

  • ToborTobor Posts: 2,300

    What precisely do you mean by "compiling"? There is a just-in-time conversion/compilation that takes non-Iray compatible shaders and makes them Iray compatible, but you shouldn't be relying on that mechanism anyway. It does not give you control over the definition of the shader. 

    As to what the GPU might do in any process related to setting up the render, but not actually be involved in the render, is an knowable unknowable. This is the domain of nVidia, and likely the many cards and drivers in use. On my system, the GPU is loaded for less than a second or two if using the JIT re-shader, and not at all during scene database building (here, the CPU cores are at 75% or higher). Only when the rendering actually starts (shows iterations) does the GPU load again. Yours might be different. 

  • SlowmichaelSlowmichael Posts: 65

    Oh i see this is when non iray shaders are made compatible with iray. Thanks for the info.

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